N any of numerous tubelike cavities containing oil or resin that occur in the fruits of certain plants, esp of parsley and other umbellifers (尤指欧芹和其它伞形植物果实的)油道
The technology and using of high pressure water cleaning for oil field's vitta and oilcan are discussed.
本文简单介绍了高压水清洗技术在清洗油田油管、运输油罐等设备时的情况。
Disc brake, as the name suggests, the shape is like a disc and its main parts include brake disc, wheel cylinder, brake caliper and vitta etc.
盘式制动器又称为碟式制动器,顾名思义是取其形状而得名:它的主要零部件有制动盘、分泵、制动钳、油管等。
Specializing in sea lifesaving, petroleum vitta reconnaissance, locating sign, self-service relay station, emergency electrical source, etc, civil and military affairs.
特别适合用于海洋救生、石油管道勘测、示位标、无人中继站、应急电源等军事民事领域。
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